21803

Properties

Appears in sequences

• Fibonacci sequence beginning 5, 19.at n=16A022143
• a(n) = 10 + floor(Sum_{j=1..n-1} a(j) / 2).at n=19A120138
• Primes p such that their cubes are pandigital.at n=13A124629
• Primes p for which Sum_{1 <= n < p} (n!|p) == 0 (mod p), where (n!|p) is the Legendre symbol.at n=34A131652
• Father primes of order 11.at n=21A136080
• Primes congruent to 32 mod 59.at n=37A142759
• Primes congruent to 26 mod 61.at n=34A142824
• Expansion of 1/(x^k*(1-x-2*x^(k+1))) for k=4.at n=25A143447
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 1), (-1, 1, 1), (0, 0, -1), (0, 0, 1), (1, 0, 1)}.at n=8A150339
• The MC polynomials.at n=31A163972
• Primes p such that p plus or minus the sum of the fourth powers of its digits is a prime in both cases.at n=35A179595
• Number of nX4 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 2,1,0,3,4 for x=0,1,2,3,4.at n=6A196432
• Number of nX7 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 2,1,0,3,4 for x=0,1,2,3,4.at n=3A196435
• T(n,k) = Number of n X k 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 2,1,0,3,4 for x=0,1,2,3,4.at n=48A196436
• T(n,k) = Number of n X k 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 2,1,0,3,4 for x=0,1,2,3,4.at n=51A196436
• Number of nX7 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 4,1,3,2,0 for x=0,1,2,3,4.at n=3A197198
• T(n,k)=Number of nXk 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 4,1,3,2,0 for x=0,1,2,3,4.at n=48A197199
• T(n,k)=Number of nXk 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 4,1,3,2,0 for x=0,1,2,3,4.at n=51A197199
• Number of n element 0..1 arrays with each element the minimum of 7 adjacent elements of a random 0..1 array of n+6 elements.at n=28A217838
• Primes p such that p - 2^2, p - 4^2 and p - 6^2 are all positive primes.at n=31A246873